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Marine Corps MOS · Aviation

6541 Aviation Ordnance Systems Technician

Current service use not established

This code is listed in the directory. Inclusion alone does not confirm current service use.

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Overview

Aviation Ordnance Systems Technicians account for, store, test, maintain, assemble, and transport aircraft armament systems, missiles, conventional munitions, and munitions handling equipment. At intermediate maintenance activities, they inspect, adjust, maintain, and repair weapons support equipment, launching and ejection equipment, aircraft guns, turrets, crew served weapons, aerial targets, and other aircraft armament systems.

Minimum clearance: Secret

Minimum ASVAB: CL 105 or GT 105

ASVAB policy: Not policy-reviewed · coverage unknown · as of 2026-10-19

Program scope has not been reviewed.

Policy applicability and coverage of the program's score routes have not been reviewed. Shown-route arithmetic is not an eligibility decision.

Source: navmc-1200-1l-fy26 (source date 2025-03). Policy applicability has not been established.

See if you would hit this score: free ASVAB practice test

Core Skills

  • Munitions accounting, storage, and transportation
  • Missile launcher and bomb rack repair
  • Armament support equipment testing and adjustment
  • Weapons maintenance quality assurance

Civilian Career Paths

Career associations are editorial assessments of the cited evidence, not an official crosswalk unless the evidence explicitly says so. O*NET supplies civilian occupation information, not proof of a military match. Related experience does not confer civilian qualifications. Tasks and tools below describe civilian work, not military training.

Maintenance and Repair Workers, General

IMA-level testing, adjustment, preventive maintenance, and repair of armament support equipment transfer directly to equipment maintenance work.

How to prepare: Build a repair portfolio showing equipment faults, tests performed, adjustments made, and verification results, then target equipment-focused maintenance openings.

What the civilian work involves
  • Perform routine maintenance, such as inspecting drives, motors, or belts, checking fluid levels, replacing filters, or doing other preventive maintenance actions.
  • Inspect, operate, or test machinery or equipment to diagnose machine malfunctions.
  • Repair machines, equipment, or structures, using tools such as hammers, hoists, saws, drills, wrenches, or equipment such as precision measuring instruments or electrical or electronic testing devices.

Inspectors, Testers, Sorters, Samplers, and Weighers

IMA-level inspections, equipment tests, and quality-assurance duties provide a direct foundation for product and equipment inspection.

How to prepare: Practice dimensional inspection with calipers, gauges, and micrometers against a sample product specification before applying to equipment quality-inspection openings.

What the civilian work involves
  • Discard or reject products, materials, or equipment not meeting specifications.
  • Measure dimensions of products to verify conformance to specifications, using measuring instruments, such as rulers, calipers, gauges, or micrometers.
  • Inspect, test, or measure materials, products, installations, or work for conformance to specifications.
Civilian tools and software (examples)
  • Microsoft Excel

Aircraft Structure, Surfaces, Rigging, and Systems Assemblers

Aircraft armament assembly and IMA-level component testing, adjustment, and repair overlap with aircraft systems assembly and rework.

How to prepare: Take a hands-on aircraft assembly course covering blueprint interpretation, fasteners, and fit checks to extend armament-specific experience into production assembly.

What the civilian work involves
  • Assemble parts, fittings, or subassemblies on aircraft, using layout tools, hand tools, power tools, or fasteners, such as bolts, screws, rivets, or clamps.
  • Inspect or test installed units, parts, systems, or assemblies for fit, alignment, performance, defects, or compliance with standards, using measuring instruments or test equipment.
  • Adjust, repair, rework, or replace parts or assemblies to ensure proper operation.
Civilian tools and software (examples)
  • SAP software

Training & Development

Choose credentials for your target role. COOL funding markers describe program listings, not a guarantee of eligibility or funding.

Getting Started

  • ASTM NCATT Foreign Object Elimination (FOE)

    Develop aircraft-production knowledge of tool accountability, material handling, parts protection, and foreign object damage prevention.

    Eligibility and preparation: No mandatory prior credential, education, or experience; AET certification is not required.

    For: Aircraft Structure, Surfaces, Rigging, and Systems Assemblers

  • Certified Aerospace Technician Core

    Validate foundational aerospace mechanics, electricity, testing, materials, and safety knowledge through written, oral, and practical assessment.

    Eligibility and preparation: Meet one route: active-duty or veteran service in an aeronautical, aviation, aerospace, or engineering MOS, rating, or assignment; two years of work experience in one of those fields; a related college or technical-school degree of at least two years; or an FAA Airframe & Powerplant Certificate.

    For: Aircraft Structure, Surfaces, Rigging, and Systems Assemblers

Career Growth

  • Certified Maintenance and Reliability Professionals (CMRP)

    Broaden equipment-repair experience into reliability, physical asset management, and maintenance work management.

    Eligibility and preparation: No education or work-experience minimum; candidates must not have taken the exam within the preceding six months.

    For: Maintenance and Repair Workers, General

Notes & Sources

  • The verified duty description places the detailed inspection, repair, and quality-assurance duties at the intermediate maintenance activity (IMA) level.
Evidence for this guidance (10 documents)
  1. NAVMC 1200.1L (FY26, in force): MOS 6541

    [1] MOS 6541 section "a. Summary"; cached text line 53013; NAVMC 1200.1L signed 2025-03-07, in force until 2026-10-01

    Supports: Munitions accounting, storage, and transportation, Missile launcher and bomb rack repair, Armament support equipment testing and adjustment, Weapons maintenance quality assurance, Maintenance and Repair Workers, General (O*NET 49-9071.00), Inspectors, Testers, Sorters, Samplers, and Weighers (O*NET 51-9061.00), Aircraft Structure, Surfaces, Rigging, and Systems Assemblers (O*NET 51-2011.00)

  2. O*NET: Maintenance and Repair Workers, General

    [2] O*NET 30.3 occupational data

    Supports: Maintenance and Repair Workers, General (O*NET 49-9071.00)

  3. O*NET: Inspectors, Testers, Sorters, Samplers, and Weighers

    [3] O*NET 30.3 occupational data

    Supports: Inspectors, Testers, Sorters, Samplers, and Weighers (O*NET 51-9061.00)

  4. O*NET: Aircraft Structure, Surfaces, Rigging, and Systems Assemblers

    [4] O*NET 30.3 occupational data

    Supports: Aircraft Structure, Surfaces, Rigging, and Systems Assemblers (O*NET 51-2011.00)

  5. COOL credential mapping: ASTM NCATT Foreign Object Elimination (FOE)

    [5] 6541 cached COOL credential feed

    Supports: ASTM NCATT Foreign Object Elimination (FOE)

    [6]SpaceTEC Partners, Inc.: ASTM NCATT certification information, exam list, and FAQ · Background; Exams Offered (Aircraft Electronics Technician, AET Endorsements, Other ASTM NCATT exams); Frequently Asked Questions; retrieved 2026-09-23

    Supports: ASTM NCATT Foreign Object Elimination (FOE)

  6. ASTM NCATT FOE Elements of Basic Awareness Study Guide (PDF, copyright 2022 ASTM International NCATT)

    [7] Scope (sec. 1) and Significance and Use (sec. 3); retrieved 2026-09-23

    Supports: ASTM NCATT Foreign Object Elimination (FOE)

  7. COOL credential mapping: Certified Aerospace Technician Core

    [8] 6541 cached COOL credential feed

    Supports: Certified Aerospace Technician Core

    [10]SpaceTEC Partners, Inc.: Certified Aerospace Technician - Core Certification · Core Certification section; retrieved 2026-09-23

    Supports: Certified Aerospace Technician Core

  8. SpaceTEC Partners, Inc.: Qualifications for SpaceTEC Certifications

    [9] Qualifications for SpaceTEC Certified Aerospace Technician Core; retrieved 2026-09-23

    Supports: Certified Aerospace Technician Core

  9. COOL credential mapping: Certified Maintenance and Reliability Professionals (CMRP)

    [11] 6541 cached COOL credential feed

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

  10. Society for Maintenance and Reliability Professionals: CMRP eligibility

    [12] Eligibility; retrieved 23 September 2026

    Supports: Certified Maintenance and Reliability Professionals (CMRP)

Defense contractor jobs for 6541

Descriptions may be summarized for clarity. Verify all information with your branch career counselor or official military documentation before making career decisions.

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